.main h1{
    padding: 0;
    margin-bottom: 0;
    border-bottom: 0;
}
.main .w .about_us div p{
    font-size: 5px;
    line-height: 34px;
}
.main .w .about_us{
    padding-top: 0;
}
.about_us{
    background-position: center 45px;
}
.main{
    padding: 55px 0 142px 0;
}
.main .w .about_us div{
    margin-top: 42px;
}
.main .w .about_us div p:nth-child(-n+3){
    font-weight: 700;
}
.enterprise_culture{
    margin-top: 70px;
    padding: 60px 0 0 174.5px;
    width: 1349px;
    height: 464px;
    background: url(../images/enterprise_culture.png) no-repeat;
    background-size: 1349px 464px;
    margin-left: -174.5px;
}
.enterprise_culture h2{
    font-size: 18px;
}
.enterprise_culture .fl>p{
    margin-bottom: 20px;
    font-size: 20px;
    color: red;
    font-weight: 700;
}
.enterprise_culture ul li{
    width: 377px;
    height: 62px;
    border-bottom: 1px solid #bebebe;
}
.enterprise_culture ul li p{
    font-size: 16px;
    color: black;
    font-weight: 700;
    line-height: 32px;
}
.enterprise_culture ul li span{
    font-size: 14px;
    line-height: 29px;
    font-weight: 700;
}
.enterprise_culture .fl{
    float: left;
    margin-right: 47px;
}
.chronicle_of_events h2{
    text-align: center;
    margin: 54px 0 52px 0;
    font-size: 26px;
}
.chronicle_of_events h2 p{
    color: black;
    font-size: 28px;
}
.chronicle_of_events>p{
    text-align: center;
    margin-bottom: 26px;
    font-size: 16px;
}
.chronicle_of_events ul li{
    float: left;
    font-size: 14px;
    color: white;
}
.chronicle_of_events ul li:nth-child(2),
.chronicle_of_events ul li:nth-child(4),
.chronicle_of_events ul li:nth-child(5),
.chronicle_of_events ul li:nth-child(7){
    padding: 45px 20px 0;
    width: 250px;
    height: 174px;
    background-color: #4b4b4b;
}
.chronicle_of_events ul li p{
    margin-bottom: 16px;
}
.chronicle_of_events ul{
    overflow: hidden;
}
.chronicle_of_events>span{
    display: block;
    height: 50px;
    color: white;
    line-height: 50px;
    text-align: center;
    font-size: 18px;
    background-color: red;
}
.main h1{
    color: gray;
}